A male to male connector with 2.1mm jacks for connecting accessories to power
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USB to 2.1mm Male Barrel Jack Cable [22AWG & 1 meter] : ID 2697 : $2.75 : Adafruit Industries, Unique & fun DIY electronics and kits
12V DC Power Plug 5.5 x 2.5mm Male To Male Connector Extension Cable Wire for PC
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1 foot 20AWG 12V DC Power Cable Male to Male (Plug), ID 2.1mm OD 5.5mm
4X USB DC 5V to DC 12V 2.1mm x 5.5mm Module Converter DC Male Connector Power Cable Plug,USB to DC Cable -1M
12V DC Extension Cable 5.5mm X 2.1mm Male to Female Power Cord Extend Wire CCTV Camera & LED Strips Power Cable
12V DC Power Plug 5.5 x 2.5mm Male To Male Connector Extension Cable Wire for PC
10 Pairs 12v Power Connector 5 5mm X 2 1mm 10 Male 10 Female Power Jack Adapter Led Strip Cctv Security Camera Cable Wire Ends Plug - Business, Industry & Science - Temu
Gator GTR-PWR-DCP40 Single DC Power Cable For Pedals - 40 Inches